Statistics

Historical Statistics of the United States
Expanded and rev. ed. of: Historical statistics of the United States, colonial times to 1970. Bicentennial ed. Washington : U.S. Dept. of Commerce, Bureau of the Census, 1975. – "Many [data] series in these volumes are continued on a regular basis with periodic updates and revisions by the agency, group, or individual responsible for the original data."--Guide to the Millennial ed.

iPoll databank @ the Roper Center for Public Opinion Research
iPoll is a comprehensive, up-to-date source for US nationwide public opinion. A full-text retrieval system, the iPoll online database is organized at the question level, providing the tools to sift through nearly a half million questions asked on national public opinion surveys, 1935 to present. Surveys archived in the Roper Catalog were originally gathered by academic, commercial and media survey organizations such as Gallup Organization, Harris Interactive, Pew Research Associates, and many more.

ProQuest statistical abstract of the U.S. (2013 and 2014)
An authoritative and comprehensive summary of statistics on the social, political, and economic conditions of the United States. The online version includes monthly updates to tables, deep searching at the line-item level, powerful facets for narrowing search results, image and spreadsheet versions of all current and historical tables, along with links to provider sites

Statistical Abstract of the United States (annual; 1878 onwards)
An "authoritative and comprehensive summary of statistics on the social, political, and economic organization of the United States. Sources of data include the Census Bureau, Bureau of Labor Statistics, Bureau of Economic Analysis, and many other Federal agencies and private organizations." Although the central focus of this Website is the most recent annual edition, it also provides links to PDF files of the earlier annual editions, going back to the first in 1878.